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This study aimed to determine the effect of the percentage of biodiesel in diesel fuel mixture on diesel engine performance by using variable speed (1200, 1500, 1800, 2100, and 2400) rpm and a variable load (0.5, 1, and 1.5) kg . In this study using a diesel engine TD110-TD115 Test Bed and Instrument for Small Engines. The parameters measured in this study is Torque, Power, Air Fuel Ratio (AFR), Specific Fuel Consumption (sfc), Volumetric Efficiency, and Brake Thermal Efficiency. Fuel used is pure diesel and biodiesel blend 5% (B5), 10% (B10), 15% (B15) and 20% (B20).
From this study the highest performance diesel engines obtained on the use of diesel fuel each at rotation 2400 rpm where maximum torque of 5.5 (Nm); Power 1,382 (kW); Specific Fuel Consumption for the most economical 211.349 (g/kWh ); Air Fuel Ratio (AFR) 53.565; Volumetric Efficiency of 0.808 (80.8%); Brake Thermal Efficiency 0.422 (42.2%).